| 螺杆泵性能参数换算 | The Count of Characteristic Data of Pump Selected |
| 以下各章均列出产品性能表，当用户根据需要在性能表中无法查得轴功率及流量时，可按如下方法近似确定： | When you can"t get the capacity power and capacity from the characteristic table you need count it： |
| (一)轴功率的换算 | (一) The cowt of power |
| 1. 当压力由P变成P1而粘度、转速不变时，轴功率N： N = (QP1/3.67η0)[1+(η0/η-1)P/P1] (Kw) 式中: Q、P均为性能表中列出的接近用户需用要的那一组流量(m3/h)及压力值（Mpa）； η、η0为在性能表标定的流量、压力时对应的总效率及容积效率。它们可在相应的η-P曲线图中查得。曲线均有离散性，按照"随规格的增大而取大值" 的原则进行取值。 | 1.When the pressure is from P to P1,but viscosity and speed do not change,you count the power N:
N =(QP1/3.67η0)[1+(η0/η-1)P/P1] (Kw)
Note:
The Q, P is the data that you can get from characteristic table Q(m3/h) and P(Mpa).
η,η0is the corresponding total efficiency and volume efficiency when the capacity and pressure is signed by Q, P. You can get them from η-P Drawing. |
| 2. 当粘度从 E 变成 E1而压力、转速不变时， N = (QP/3.67η0)[1+(η0/η-1)√E1/E] (Kw)
| 2. When the viscosity is from E to E1, but the pressure and speed don"t change, you can count the power:
N = (QP/3.67η0)[1+(η0/η-1)√E1/E] (Kw)
|
| 3. 转速从 n 变成 n1时，压力、粘度不变时，轴功率 N： N = (Qpn/3.67η0n1)[1+(η0/η-1)√n1/n] (Kw) | 3. When the speed is from n to n1, but the pressure and viscosity don"t change, you can count the power N:
N = (Qpn/3.67η0n1)[1+(η0/η-1)√n1/n] (Kw) |
(二) 流量的换算
| (二) The count of capacity |
1. 对于粘度大于50E 的介质，当粘度从E变成 E1时，流量 Q 变为 Q1：
Q1= Q/η0[1-(1-η0)1/K] (m3/h)
K=(√E1+1.5)/(√E+1.5)
注：η0为标定流量Q时的容积效率；
E、E1单位恩氏粘度0E 。 | 1. When the Viscosity is from E1 and they are more than 50E, the capacity will be form Q to Q1:
Q1= Q/η0[1-(1-η0)1/K] (m3/h)
K=(√E1+1.5)/(√E+1.5) |
2. 当转速从n变成n1而粘度、压力不变时，流量Q1近似为：
Q1= Q/η0[n1/n-(1-η0)] (m3/h) | 2.When the speed is from n to n1, but the viscosity and pressure don"t change, the capacity Q1can count approximately:
Q1= Q/η0[n1/n-(1-η0)] (m3/h) |
.jpg)
